A023839 - cp's OEIS frontend

A023839 Sum of exponents in prime-power factorization of C(5n,n-2).

n	a(n)
2	0
3	2
4	3
5	5
6	6
7	7
8	8
9	9
10	9
11	10
12	10
13	13
14	12
15	15
16	13
17	15
18	15
19	14
20	16
21	18
22	16
23	18
24	19
25	19
26	22
27	23
28	23
29	24
30	23
31	23
32	22
33	26
34	22
35	24
36	25
37	24
38	24
39	28
40	26
41	27
42	28
43	27
44	28
45	33
46	30
47	29
48	31
49	33
50	33
51	34
52	35
53	38
54	37
55	39
56	37
57	37
58	38
59	38
60	42
61	40
62	38
63	40
64	39
65	41
66	38
67	36
68	38
69	43
70	40
71	44
72	42
73	44
74	42
75	44
76	45
77	48
78	49
79	49

[0, 2, 3, 5, 6, 7, 8, 9, 9, 10, 10, 13, 12, 15, 13, 15, 15, 14, 16, 18, 16, 18, 19, 19, 22, 23, 23, 24, 23, 23, 22, 26, 22, 24, 25, 24, 24, 28, 26, 27, 28, 27, 28, 33, 30, 29, 31, 33, 33, 34, 35, 38, 37, 39, 37, 37, 38, 38, 42, 40, 38, 40, 39, 41, 38, 36, 38, 43, 40, 44, 42, 44, 42, 44, 45, 48, 49, 49]

cp's OEIS Frontend

A023839 Sum of exponents in prime-power factorization of C(5n,n-2).

Table of values

List of values

n	a(n)
2	0
3	2
4	3
5	5
6	6
7	7
8	8
9	9
10	9
11	10
12	10
13	13
14	12
15	15
16	13
17	15
18	15
19	14
20	16
21	18
22	16
23	18
24	19
25	19
26	22
27	23
28	23
29	24
30	23
31	23
32	22
33	26
34	22
35	24
36	25
37	24
38	24
39	28
40	26
41	27
42	28
43	27
44	28
45	33
46	30
47	29
48	31
49	33
50	33
51	34
52	35
53	38
54	37
55	39
56	37
57	37
58	38
59	38
60	42
61	40
62	38
63	40
64	39
65	41
66	38
67	36
68	38
69	43
70	40
71	44
72	42
73	44
74	42
75	44
76	45
77	48
78	49
79	49

n	a(n)
2	0
3	2
4	3
5	5
6	6
7	7
8	8
9	9
10	9
11	10
12	10
13	13
14	12
15	15
16	13
17	15
18	15
19	14
20	16
21	18
22	16
23	18
24	19
25	19
26	22
27	23
28	23
29	24
30	23
31	23
32	22
33	26
34	22
35	24
36	25
37	24
38	24
39	28
40	26
41	27
42	28
43	27
44	28
45	33
46	30
47	29
48	31
49	33
50	33
51	34
52	35
53	38
54	37
55	39
56	37
57	37
58	38
59	38
60	42
61	40
62	38
63	40
64	39
65	41
66	38
67	36
68	38
69	43
70	40
71	44
72	42
73	44
74	42
75	44
76	45
77	48
78	49
79	49

n	a(n)
2	0
3	2
4	3
5	5
6	6
7	7
8	8
9	9
10	9
11	10
12	10
13	13
14	12
15	15
16	13
17	15
18	15
19	14
20	16
21	18
22	16
23	18
24	19
25	19
26	22
27	23
28	23
29	24
30	23
31	23
32	22
33	26
34	22
35	24
36	25
37	24
38	24
39	28
40	26
41	27
42	28
43	27
44	28
45	33
46	30
47	29
48	31
49	33
50	33
51	34
52	35
53	38
54	37
55	39
56	37
57	37
58	38
59	38
60	42
61	40
62	38
63	40
64	39
65	41
66	38
67	36
68	38
69	43
70	40
71	44
72	42
73	44
74	42
75	44
76	45
77	48
78	49
79	49